Method of making installation-loops for electric fixtures



J. SHONER. v

METHOD OF MAKING INSTALLATION LOOPS FORELECTRIC FIXTURES. APPLICATION FILED 0CT.28. I919.

1,342,071 Patented June 1, 1920.

UNITE JOHN SHONER, OF WATEBBURY CONNECTICUT, ASSIGNOB, TO THE CHAS-E COMPANIES, INC., OF WATERBURY, CONNECTICUT, A CORPORATION.

METHOD OF MAKING INSTALLATION-LOOPS FOR ELECTRIC FIXTURES.

Specification of Letters Patent.

Application filed October 28, 1919. Serial No. 333,974.

To all whom it may concern:

Be it known that I,-JOHN SHONER, a citizen of the United States, residing at Waterbury, in the county of New Haven and State of Connecticut, have invented a new and useful Improvement in Methods of Making Installation Loops for Electric Fixtures; and I do hereby declare the following, when taken in connection with the accompanying drawings and the characters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this application, and represent, in-

Figure 1. a view in side elevation of such a rod-slug as may be used in the production of my improved installation-loop.

Fig. 2. a view in side elevation showing the article after the first or heading operation.

Fig. 3. a corresponding view showing the article after the first stamping operation.

Fig. 4. an edge view thereof.

Fig. 5. a view of the article after the second stamping operation.

Fig. 6. an edge view thereof.

Fig. 7 a view of the article after the piercing operation.

Fig. 8. a corresponding View of the article after the threading operation.

Fig. 9. a view after the drilling operation which results in the production of the finished loop.

My invention relates to an improved method of making installation-loops for electric fixtures, the object being. to produce a loop of superior strength and one which may be cut and opened and closed without danger of breaking it, for the insertion into it of another loop or a link of a chain. Heretofore,-loops of this character have been made of cast metal and have partaken of the weakness pertaining to cast metal articles, frequently breaking when opened and closed for the purpose of inserting another loop or a link of a chain.

With these ends in view, my invention consists in a series of forming steps by means of which installation-loops of superior strength are produced from wroughtmetal.

In carrying out my invention, I use a rod-slug 2 of suitable length and diameter. This slug is first headed in a suitable heading-machine whereby the stock is displaced to produce an annular seating-flange 3 between the stem-end 4 of the slug, which end is countersunk as at 5, and the ring-end 6 of the slug which is bulged, the slug being shortened by this heading operation. The slug as thus developed is now subjected to the action of a stamping-press whereby its bulged ring-end 6 is flattened to form a diskshaped ring-blank 7, shown in Figs. 3 and 4. The article is then subjected to a second stamping operation in which the ring-blank 7 is further flattened and enlarged to the desired diameter and thickness as shown at 8 in Figs. 5 and 6. The articleis now subjected to a piercing operation whereby the ring 9 is produced. The stem-end 4 is now threaded as at 10 as shown by Fig. 8. The blank is finally drilled as at 11 through the threaded stem-end 4 into the ring 8, this drilling operation being assisted by the countersink 5 in the stem-end 4C. These sev- Patented une I, 1920.

eral operations-upon the rod-slug 2 work the metal so that the finished loop is far tougher and stronger than "if made of cast metal-so tough and strong that the ring 9 may be sawed open and bent in either direction for the insertion of another loop or the link of a chain and then bent back and.

closed, without danger of breaking. The

loop, moreover, is so strong that comparatively heavy weights in the form of heavy chain fixtures suspending glass shades, may

a rodslug to a heading operation for producing a countersunk stem-end, a bulged ring-end and an annular seating-flange between the same, then subjecting the article to one or more stamping operations for fiattening its bulged ring-end to the required thickness and diameter, then piercing. its flattened ring-end to produce the ring, and threadingand drilling its stem-end.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

JOHN SHONER.

Witnesses:

J. S. NEAGLE,

A. C. Broken. 

